PoR_stress2grid: Spatial Interpolation of SHmax in PoR Coordinate Reference System

Description

The data is transformed into the PoR system before the interpolation. The interpolation grid is returned in geographical coordinates and azimuths.

Usage

PoR_stress2grid(
  x,
  PoR,
  grid = NULL,
  PoR_grid = TRUE,
  lon_range = NULL,
  lat_range = NULL,
  gridsize = 2.5,
  remove_PoR = FALSE,
  ...
)
PoR_stress2grid_stats(
  x,
  PoR,
  grid = NULL,
  PoR_grid = TRUE,
  lon_range = NULL,
  lat_range = NULL,
  gridsize = 2.5,
  remove_PoR = FALSE,
  ...
)

Value

sf object containing

lon,lat: longitude and latitude in geographical CRS (in degrees)
lon.PoR,lat.PoR: longitude and latitude in PoR CRS (in degrees). Only if remove_PoR=TRUE
azi: geographical mean SHmax in degree
azi.PoR: PoR mean SHmax in degree. Only if remove_PoR=TRUE
sd: Standard deviation of SHmax in degrees
R: Search radius in km
mdr: Mean distance of datapoints per search radius
N: Number of data points in search radius

Arguments

x

sf object containing

azi: SHmax in degree

unc

Uncertainties of SHmax in degree

type

Methods used for the determination of the orientation of SHmax

PoR

Pole of Rotation. data.frame or object of class "euler.pole" containing the geographical coordinates of the Euler pole

grid

(optional) Point object of class sf.

PoR_grid

logical. Whether the grid should be generated based on the coordinate range in the PoR (TRUE, the default) CRS or the geographical CRS (FALSE). Is ignored if grid is specified.

lon_range, lat_range

(optional) numeric vector specifying the minimum and maximum longitudes and latitudes (are ignored if grid is specified).

gridsize

Numeric. Target spacing of the regular grid in decimal degree. Default is 2.5 (is ignored if grid is specified)

remove_PoR

logical. Whether PoR azimuths and coordinates will be removed from final output or not (the default.)

...

Arguments passed to stress2grid()

Details

Stress field and wavelength analysis in PoR system and back-transformed

Examples

Run this code

data("san_andreas")
data("nuvel1")
PoR <- subset(nuvel1, nuvel1$plate.rot == "na")
PoR_stress2grid(san_andreas, PoR) |> head()

if (FALSE) {
PoR_stress2grid_stats(san_andreas, PoR, mode = TRUE) |> head()
}